You are in :Skill Monkey Games
Use down arrow key to lower the grapple or you can use spacebar instead. Left and right arrow key are to move the ship around. To finish the level you have to collect all of the treasure chests from the bottom of the sea.
At the end of the level you can see the statistics which show you how you've earned your points. You get points for remaining time, for beating the pirates and of course for collecting bonus items (starfish, diamonds, blue box is monkey boat speed bonus...). You have no bombs on level one, so you can't respond to pirates fire. The bomb you see floating is a mine and if you try to pick it up it will explode and you will lose a life. On higher levels the number of underwater mines is rising. The game has 10 levels in total.